we are talking about presentation clarity, and it should be as clear as possible.
Are you playing the difference between department "head" and "chairman"? you know what I mean - the person who decide the hiring. This person will be different in different cases. Frankly with you, I just got two invitation to join as professor from two universities, one from my former boss, a department head, and one from my friend, who is just a associate and has about $8 million dollars to spend in next 5 years.
I paid my price at the presentation right after phd. My Shi-Di and I applied for a same position, and I have a little more achievement than him in research, publications, and presentations. I think the reason might be the research work he chose to present was quite fresh to them, while I presented what they were doing/good at (our research covered at least 3 areas). Or maybe they liked him better. But we all ended good.